Move PX4 Guide source into /docs (#24490)

* Add vitepress tree

* Update existing workflows so they dont trigger on changes in the docs path

* Add nojekyll, package.json, LICENCE etc

* Add crowdin docs upload/download scripts

* Add docs flaw checker workflows

* Used docs prefix for docs workflows

* Crowdin obvious fixes

* ci: docs move to self hosted runner

runs on a beefy server for faster builds

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

* ci: don't run build action for docs or ci changes

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

* ci: update runners

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

* Add docs/en

* Add docs assets and scripts

* Fix up editlinks to point to PX4 sources

* Download just the translations that are supported

* Add translation sources for zh, uk, ko

* Update latest tranlsation and uorb graphs

* update vitepress to latest

---------

Signed-off-by: Ramon Roche <mrpollo@gmail.com>
Co-authored-by: Ramon Roche <mrpollo@gmail.com>

docs/zh/frames_sub/index.md

@@ -0,0 +1,40 @@
+# Submarines (Unmanned Underwater Vehicles - UUV)
+
+<LinkedBadge type="warning" text="Experimental" url="../airframes/#experimental-vehicles"/>
+
+:::warning
+Support for UUVs is [experimental](../airframes/index.md#experimental-vehicles).
+Maintainer volunteers, [contribution](../contribute/index.md) of new features, new frame configurations, or other improvements would all be very welcome!
+
+At time of writing it has only been tested using ROS in offboard mode.
+The following features have not been implemented:
+
+- Modes like missions, depth hold, stabilised manual control, etc.
+- BlueRobotics gripper support.
+
+:::
+
+PX4 has basic support for UUVs.
+
+## Supported Frames
+
+PX4 supports several unmanned underwater vehicle (UUV) frames.
+The set of supported configurations can be seen in [Airframe Reference > Underwater Robots](../airframes/airframe_reference.md#underwater-robot).
+
+### PX4 Compatible (Fully Assembled)
+
+This section lists fully assembled vehicles where you can update the software to run PX4.
+
+- [BlueROV2](../frames_sub/bluerov2.md): Vectored 6 DOF UUV
+
+### Other Frames
+
+- HippoCampus UUV: [Airframe Reference](../airframes/airframe_reference.md#underwater_robot_underwater_robot_hippocampus_uuv_%28unmanned_underwater_vehicle%29), [Gazebo Classic Simulation](../sim_gazebo_classic/vehicles.md#hippocampus-tuhh-uuv)
+
+## 视频
+
+<lite-youtube videoid="1sUaURmlmT8" title="PX4 on BlueRov Demo"/>
+
+---
+
+<lite-youtube videoid="xSXSoUK-iBM" title="Hippocampus UUV in PX4 SITL Gazebo"/>